1 files changed, 431 insertions, 0 deletions

diff --git a/drivers/gpu/drm/virtio/virtgpu_fb.c b/drivers/gpu/drm/virtio/virtgpu_fb.c
new file mode 100644
index 000000000000..df198d9e770c
--- /dev/null
+++ b/drivers/gpu/drm/virtio/virtgpu_fb.c
@@ -0,0 +1,431 @@
+/*
+ * Copyright (C) 2015 Red Hat, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_fb_helper.h>
+#include "virtgpu_drv.h"
+
+#define VIRTIO_GPU_FBCON_POLL_PERIOD (HZ / 60)
+
+struct virtio_gpu_fbdev {
+	struct drm_fb_helper           helper;
+	struct virtio_gpu_framebuffer  vgfb;
+	struct list_head	       fbdev_list;
+	struct virtio_gpu_device       *vgdev;
+	struct delayed_work            work;
+};
+
+static int virtio_gpu_dirty_update(struct virtio_gpu_framebuffer *fb,
+				   bool store, int x, int y,
+				   int width, int height)
+{
+	struct drm_device *dev = fb->base.dev;
+	struct virtio_gpu_device *vgdev = dev->dev_private;
+	bool store_for_later = false;
+	int bpp = fb->base.bits_per_pixel / 8;
+	int x2, y2;
+	unsigned long flags;
+	struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(fb->obj);
+
+	if ((width <= 0) ||
+	    (x + width > fb->base.width) ||
+	    (y + height > fb->base.height)) {
+		DRM_DEBUG("values out of range %dx%d+%d+%d, fb %dx%d\n",
+			  width, height, x, y,
+			  fb->base.width, fb->base.height);
+		return -EINVAL;
+	}
+
+	/*
+	 * Can be called with pretty much any context (console output
+	 * path).  If we are in atomic just store the dirty rect info
+	 * to send out the update later.
+	 *
+	 * Can't test inside spin lock.
+	 */
+	if (in_atomic() || store)
+		store_for_later = true;
+
+	x2 = x + width - 1;
+	y2 = y + height - 1;
+
+	spin_lock_irqsave(&fb->dirty_lock, flags);
+
+	if (fb->y1 < y)
+		y = fb->y1;
+	if (fb->y2 > y2)
+		y2 = fb->y2;
+	if (fb->x1 < x)
+		x = fb->x1;
+	if (fb->x2 > x2)
+		x2 = fb->x2;
+
+	if (store_for_later) {
+		fb->x1 = x;
+		fb->x2 = x2;
+		fb->y1 = y;
+		fb->y2 = y2;
+		spin_unlock_irqrestore(&fb->dirty_lock, flags);
+		return 0;
+	}
+
+	fb->x1 = fb->y1 = INT_MAX;
+	fb->x2 = fb->y2 = 0;
+
+	spin_unlock_irqrestore(&fb->dirty_lock, flags);
+
+	{
+		uint32_t offset;
+		uint32_t w = x2 - x + 1;
+		uint32_t h = y2 - y + 1;
+
+		offset = (y * fb->base.pitches[0]) + x * bpp;
+
+		virtio_gpu_cmd_transfer_to_host_2d(vgdev, obj->hw_res_handle,
+						   offset,
+						   cpu_to_le32(w),
+						   cpu_to_le32(h),
+						   cpu_to_le32(x),
+						   cpu_to_le32(y),
+						   NULL);
+
+	}
+	virtio_gpu_cmd_resource_flush(vgdev, obj->hw_res_handle,
+				      x, y, x2 - x + 1, y2 - y + 1);
+	return 0;
+}
+
+int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *vgfb,
+			     struct drm_clip_rect *clips,
+			     unsigned num_clips)
+{
+	struct virtio_gpu_device *vgdev = vgfb->base.dev->dev_private;
+	struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(vgfb->obj);
+	struct drm_clip_rect norect;
+	struct drm_clip_rect *clips_ptr;
+	int left, right, top, bottom;
+	int i;
+	int inc = 1;
+	if (!num_clips) {
+		num_clips = 1;
+		clips = &norect;
+		norect.x1 = norect.y1 = 0;
+		norect.x2 = vgfb->base.width;
+		norect.y2 = vgfb->base.height;
+	}
+	left = clips->x1;
+	right = clips->x2;
+	top = clips->y1;
+	bottom = clips->y2;
+
+	/* skip the first clip rect */
+	for (i = 1, clips_ptr = clips + inc;
+	     i < num_clips; i++, clips_ptr += inc) {
+		left = min_t(int, left, (int)clips_ptr->x1);
+		right = max_t(int, right, (int)clips_ptr->x2);
+		top = min_t(int, top, (int)clips_ptr->y1);
+		bottom = max_t(int, bottom, (int)clips_ptr->y2);
+	}
+
+	if (obj->dumb)
+		return virtio_gpu_dirty_update(vgfb, false, left, top,
+					       right - left, bottom - top);
+
+	virtio_gpu_cmd_resource_flush(vgdev, obj->hw_res_handle,
+				      left, top, right - left, bottom - top);
+	return 0;
+}
+
+static void virtio_gpu_fb_dirty_work(struct work_struct *work)
+{
+	struct delayed_work *delayed_work = to_delayed_work(work);
+	struct virtio_gpu_fbdev *vfbdev =
+		container_of(delayed_work, struct virtio_gpu_fbdev, work);
+	struct virtio_gpu_framebuffer *vgfb = &vfbdev->vgfb;
+
+	virtio_gpu_dirty_update(&vfbdev->vgfb, false, vgfb->x1, vgfb->y1,
+				vgfb->x2 - vgfb->x1, vgfb->y2 - vgfb->y1);
+}
+
+static void virtio_gpu_3d_fillrect(struct fb_info *info,
+				   const struct fb_fillrect *rect)
+{
+	struct virtio_gpu_fbdev *vfbdev = info->par;
+	sys_fillrect(info, rect);
+	virtio_gpu_dirty_update(&vfbdev->vgfb, true, rect->dx, rect->dy,
+			     rect->width, rect->height);
+	schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
+}
+
+static void virtio_gpu_3d_copyarea(struct fb_info *info,
+				   const struct fb_copyarea *area)
+{
+	struct virtio_gpu_fbdev *vfbdev = info->par;
+	sys_copyarea(info, area);
+	virtio_gpu_dirty_update(&vfbdev->vgfb, true, area->dx, area->dy,
+			   area->width, area->height);
+	schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
+}
+
+static void virtio_gpu_3d_imageblit(struct fb_info *info,
+				    const struct fb_image *image)
+{
+	struct virtio_gpu_fbdev *vfbdev = info->par;
+	sys_imageblit(info, image);
+	virtio_gpu_dirty_update(&vfbdev->vgfb, true, image->dx, image->dy,
+			     image->width, image->height);
+	schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
+}
+
+static struct fb_ops virtio_gpufb_ops = {
+	.owner = THIS_MODULE,
+	.fb_check_var = drm_fb_helper_check_var,
+	.fb_set_par = drm_fb_helper_set_par, /* TODO: copy vmwgfx */
+	.fb_fillrect = virtio_gpu_3d_fillrect,
+	.fb_copyarea = virtio_gpu_3d_copyarea,
+	.fb_imageblit = virtio_gpu_3d_imageblit,
+	.fb_pan_display = drm_fb_helper_pan_display,
+	.fb_blank = drm_fb_helper_blank,
+	.fb_setcmap = drm_fb_helper_setcmap,
+	.fb_debug_enter = drm_fb_helper_debug_enter,
+	.fb_debug_leave = drm_fb_helper_debug_leave,
+};
+
+static int virtio_gpu_vmap_fb(struct virtio_gpu_device *vgdev,
+			      struct virtio_gpu_object *obj)
+{
+	return virtio_gpu_object_kmap(obj, NULL);
+}
+
+static int virtio_gpufb_create(struct drm_fb_helper *helper,
+			       struct drm_fb_helper_surface_size *sizes)
+{
+	struct virtio_gpu_fbdev *vfbdev =
+		container_of(helper, struct virtio_gpu_fbdev, helper);
+	struct drm_device *dev = helper->dev;
+	struct virtio_gpu_device *vgdev = dev->dev_private;
+	struct fb_info *info;
+	struct drm_framebuffer *fb;
+	struct drm_mode_fb_cmd2 mode_cmd = {};
+	struct virtio_gpu_object *obj;
+	struct device *device = vgdev->dev;
+	uint32_t resid, format, size;
+	int ret;
+
+	mode_cmd.width = sizes->surface_width;
+	mode_cmd.height = sizes->surface_height;
+	mode_cmd.pitches[0] = mode_cmd.width * 4;
+	mode_cmd.pixel_format = drm_mode_legacy_fb_format(32, 24);
+
+	switch (mode_cmd.pixel_format) {
+#ifdef __BIG_ENDIAN
+	case DRM_FORMAT_XRGB8888:
+		format = VIRTIO_GPU_FORMAT_X8R8G8B8_UNORM;
+		break;
+	case DRM_FORMAT_ARGB8888:
+		format = VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM;
+		break;
+	case DRM_FORMAT_BGRX8888:
+		format = VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM;
+		break;
+	case DRM_FORMAT_BGRA8888:
+		format = VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM;
+		break;
+	case DRM_FORMAT_RGBX8888:
+		format = VIRTIO_GPU_FORMAT_R8G8B8X8_UNORM;
+		break;
+	case DRM_FORMAT_RGBA8888:
+		format = VIRTIO_GPU_FORMAT_R8G8B8A8_UNORM;
+		break;
+	case DRM_FORMAT_XBGR8888:
+		format = VIRTIO_GPU_FORMAT_X8B8G8R8_UNORM;
+		break;
+	case DRM_FORMAT_ABGR8888:
+		format = VIRTIO_GPU_FORMAT_A8B8G8R8_UNORM;
+		break;
+#else
+	case DRM_FORMAT_XRGB8888:
+		format = VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM;
+		break;
+	case DRM_FORMAT_ARGB8888:
+		format = VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM;
+		break;
+	case DRM_FORMAT_BGRX8888:
+		format = VIRTIO_GPU_FORMAT_X8R8G8B8_UNORM;
+		break;
+	case DRM_FORMAT_BGRA8888:
+		format = VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM;
+		break;
+	case DRM_FORMAT_RGBX8888:
+		format = VIRTIO_GPU_FORMAT_X8B8G8R8_UNORM;
+		break;
+	case DRM_FORMAT_RGBA8888:
+		format = VIRTIO_GPU_FORMAT_A8B8G8R8_UNORM;
+		break;
+	case DRM_FORMAT_XBGR8888:
+		format = VIRTIO_GPU_FORMAT_R8G8B8X8_UNORM;
+		break;
+	case DRM_FORMAT_ABGR8888:
+		format = VIRTIO_GPU_FORMAT_R8G8B8A8_UNORM;
+		break;
+#endif
+	default:
+		DRM_ERROR("failed to find virtio gpu format for %d\n",
+			  mode_cmd.pixel_format);
+		return -EINVAL;
+	}
+
+	size = mode_cmd.pitches[0] * mode_cmd.height;
+	obj = virtio_gpu_alloc_object(dev, size, false, true);
+	if (IS_ERR(obj))
+		return PTR_ERR(obj);
+
+	virtio_gpu_resource_id_get(vgdev, &resid);
+	virtio_gpu_cmd_create_resource(vgdev, resid, format,
+				       mode_cmd.width, mode_cmd.height);
+
+	ret = virtio_gpu_vmap_fb(vgdev, obj);
+	if (ret) {
+		DRM_ERROR("failed to vmap fb %d\n", ret);
+		goto err_obj_vmap;
+	}
+
+	/* attach the object to the resource */
+	ret = virtio_gpu_object_attach(vgdev, obj, resid, NULL);
+	if (ret)
+		goto err_obj_attach;
+
+	info = framebuffer_alloc(0, device);
+	if (!info) {
+		ret = -ENOMEM;
+		goto err_fb_alloc;
+	}
+
+	ret = fb_alloc_cmap(&info->cmap, 256, 0);
+	if (ret) {
+		ret = -ENOMEM;
+		goto err_fb_alloc_cmap;
+	}
+
+	info->par = helper;
+
+	ret = virtio_gpu_framebuffer_init(dev, &vfbdev->vgfb,
+					  &mode_cmd, &obj->gem_base);
+	if (ret)
+		goto err_fb_init;
+
+	fb = &vfbdev->vgfb.base;
+
+	vfbdev->helper.fb = fb;
+	vfbdev->helper.fbdev = info;
+
+	strcpy(info->fix.id, "virtiodrmfb");
+	info->flags = FBINFO_DEFAULT;
+	info->fbops = &virtio_gpufb_ops;
+	info->pixmap.flags = FB_PIXMAP_SYSTEM;
+
+	info->screen_base = obj->vmap;
+	info->screen_size = obj->gem_base.size;
+	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
+	drm_fb_helper_fill_var(info, &vfbdev->helper,
+			       sizes->fb_width, sizes->fb_height);
+
+	info->fix.mmio_start = 0;
+	info->fix.mmio_len = 0;
+	return 0;
+
+err_fb_init:
+	fb_dealloc_cmap(&info->cmap);
+err_fb_alloc_cmap:
+	framebuffer_release(info);
+err_fb_alloc:
+	virtio_gpu_cmd_resource_inval_backing(vgdev, resid);
+err_obj_attach:
+err_obj_vmap:
+	virtio_gpu_gem_free_object(&obj->gem_base);
+	return ret;
+}
+
+static int virtio_gpu_fbdev_destroy(struct drm_device *dev,
+				    struct virtio_gpu_fbdev *vgfbdev)
+{
+	struct fb_info *info;
+	struct virtio_gpu_framebuffer *vgfb = &vgfbdev->vgfb;
+
+	if (vgfbdev->helper.fbdev) {
+		info = vgfbdev->helper.fbdev;
+
+		unregister_framebuffer(info);
+		framebuffer_release(info);
+	}
+	if (vgfb->obj)
+		vgfb->obj = NULL;
+	drm_fb_helper_fini(&vgfbdev->helper);
+	drm_framebuffer_cleanup(&vgfb->base);
+
+	return 0;
+}
+static struct drm_fb_helper_funcs virtio_gpu_fb_helper_funcs = {
+	.fb_probe = virtio_gpufb_create,
+};
+
+int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev)
+{
+	struct virtio_gpu_fbdev *vgfbdev;
+	int bpp_sel = 32; /* TODO: parameter from somewhere? */
+	int ret;
+
+	vgfbdev = kzalloc(sizeof(struct virtio_gpu_fbdev), GFP_KERNEL);
+	if (!vgfbdev)
+		return -ENOMEM;
+
+	vgfbdev->vgdev = vgdev;
+	vgdev->vgfbdev = vgfbdev;
+	INIT_DELAYED_WORK(&vgfbdev->work, virtio_gpu_fb_dirty_work);
+
+	drm_fb_helper_prepare(vgdev->ddev, &vgfbdev->helper,
+			      &virtio_gpu_fb_helper_funcs);
+	ret = drm_fb_helper_init(vgdev->ddev, &vgfbdev->helper,
+				 vgdev->num_scanouts,
+				 VIRTIO_GPUFB_CONN_LIMIT);
+	if (ret) {
+		kfree(vgfbdev);
+		return ret;
+	}
+
+	drm_fb_helper_single_add_all_connectors(&vgfbdev->helper);
+	drm_fb_helper_initial_config(&vgfbdev->helper, bpp_sel);
+	return 0;
+}
+
+void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev)
+{
+	if (!vgdev->vgfbdev)
+		return;
+
+	virtio_gpu_fbdev_destroy(vgdev->ddev, vgdev->vgfbdev);
+	kfree(vgdev->vgfbdev);
+	vgdev->vgfbdev = NULL;
+}